Power lift for plows



Se t. l9

27 w. J. VERlTY ET AL POWER LIFT FOR FLOWS Filed April 17, 1926 2 Sheets-Sheet 1 INVENTUREII N m a P i Se t.

p 1927' w. J. VERITY ET AL POWER LIFT FOR FLOWS Filed April 17, 1926 2 Sheets-Sheet 2 .w mvgm uas Patented Sept. 13, 1927.

I UNITED PATENT OFFICE.

WILLIAM JOHN 'vnarry Ann P UI. ABRAHAM VAN SICKLE, or BRANTFOR ON- 3 TARIO, CANADA, ASSIGNORS TO MAssEY-H naIs COMPANY, LIMITED, or TORONTO,

, CANADA...

rowan LIFT F R PLows.

Application filed April 17, 1926. Serial N0.'102,689.

' This invention relates toplow lifts for plows and more particularly to plow lifts for that type of plow commonly-called frameless in which no frame is provided other than the plOW beam, and our object is to provide a power lift which is simple in design, cheap to'manufacture and which may be readily assembled and'yet be durable and efficient. Hereto'fore the power lifts used on frameless plows were of a type which permittedtheflland wheel axle to fioattand depended solely on the suction or dip of the bottoms to hold them in their working position in the ground. Another object is to so construct our power lift that it will overcome the above objectionable floating featureof theland wheel axle by releasably locking the relatively movable parts of the frameless type of plow to form a rigid plow when set in its working position.

WVe attain our objects by providing a land wheel of the plow with avnotched drum adapted to be clutched with'the power lift which is freely mounted on the axle of the said land wheel. The plow bottoms are secured to a beam which is connected by means of a rod with the power lift, and by means of a crank with the land wheel. Manually controlled means is provided for rocking a pivoted trigger to operate clutching mechanism which causes a carrier to be revolved with the land wheel until the said means engages an arm on the clutching mechanism to declutch the power lift. During this'partial revolution of the carrier the connecting rod raises the plow beam and thus the plow bottoms are raised clear of the ground. A roller of the manually controlled means that engages the arm is, pulled by a string into a recess in the periphery of the carrier which releasably locks the power lift and thus the plow bottoms in their raised posi tion.

The'plow bottoms are lowered by means of gravity into the ground when'the manually controlled means are again operated to remove the roller thereof from the recess. The carrier is provided with a notch adjacent the trigger and this notch is adapted to The constructions are hereinafter more fullydescribed and illustrated inthe accompanying drawings in Which- Fig. 1 is a side elevation of a franieless plow having our improvements thereon;

Fig. 2 a cross section, on an enlarged scale, through the land wheel axle showing the parts in the position they occupy when the plow is in operation;

Fig. 8 a view similar toFig 2 showing the1 power lift in operation to raise the plow Fig. 4 an underside plan view of Fig. 2. In the drawings like numerals of reference indicate corresponding parts in the different figures.

l is the land wheel of the plow and this wheel is journalled on an axle 2 formed on the crank arm 3 which is pivoted on a beam 4. I The beam carries the plow bottoms 5and disc cuttersfi, and is adapted to beconnected with a draw bar of a tractor. The plow also includes a furrow. wheel carried on a cranked axle which is adjusted in the ordinary manner, these parts not being shown. This type of plow, in which'there is no second frame for carrying the drawbar attachments and forcarrying the plow'frame or beam, is'commonly termed frameless.

The hub 7 of the land wheel 1 carries a drum 8 having notches 9 formedin its inner periphery. On the axle 2 is freely mounted a carrier 10 on which a pawl 11 and a trigger 12 are pivoted. The pawl is provided with a laterally extending projection 13 including an anti-friction roller adapted to be received in the notches 9. A spring 14 having one end connected with the pawl and the other end connected'withthe trigger 12 tends to rock the'p'awl to clutch the projection with the drum when the trigger is rocked on its pivot 15. The trigger is provided with a nose 16 adapted to engage the sideof an extension 11 formedon the pawl to position the projection out of. engagement with the drum and the spring normally tends to rock the trigger to its position for holding the projection in its inoperative or declutch'ed position. The. extension 11 is formed with a recess 18 adapted, when the triggeris released, to be engaged by the nose 16-to limit the'movement of the projection towards its clutching position. 1

The carrier is provided with an annular rih ll) adapted to overlie the inner portion of the drum 8. The rih has ojienings ill) and :21 therein for the passage oi an arm 22 and a enrved end 23 fol-tiled. on the pawl and the trigger respectively. The end QS engages a shoulder Qtl on the rib 19 to limit the inward swing of the triggeig A eonneoting rod is pivotally eonneeted with the *arrier eccentric to its axis and with hand lever 26 adjustahly carried in any suitable manner on tllGlJQtlIIl From the above description it obvious that by rocking the trigger [to release the pawl the projectionthereon will he clutched with the drum whereby the carrier will be rotated therewith to raise the heanrand the plow hotton s relative to the ground. This movement of thetrigger is aeeomplished by a lever 27 pivoted on the crank arm 3 and provided with a roller i-ZS at one end and a cord 29 at the otl'ier end A spring 30 conneeted with the lever and a suitable stationary part tends to maintain the roller in engagentent with the periphery o l the earrier 10. flhe roller is adapted to he received either in a recess 31 or in a notch 32 formed in the j ieripliery ol the garrier and respectively located adjacent the arm 22 on the and tlie eurved end 23 oi the trigger. wring to Figs. 2 and 3 it will he noted that the notch 32 is substantially semi-circular in shape to form two shoulders 3i; and let adapted toengage the oppositesides ot' the roller to limit any relative rotary movement in either direction between the roller and the carrier It will also he noted that the eurved end :32} is s jiaced relative to the noteh 82 and theshonlder hi} to provide just sutticient clearance for the roller to ride over the shoulder 33 and into the notch.

l \ssumingjthe plow bottoms are in their cutting position as shown in liip'. 1 and the roller 28 is positioned in t he notch 32, the mode of operation is as follows. lVhen it is desired to raise the plow bottoms, the o jierator pullstlie cord Qllwhich causes the roller on the lower end of the lever 27 to swing out ot' the notch and at the same time engage the tftllVt-tlhlltfl 23 ot' the trigger to rock the latter and swing its nose 16 out of engagement with the side of the extension 11. 1 This permits the spring letto rock the pawl ll to elutch the projection 13 with the notched drinn S whieh causes. the carrier to rotate with the latter. The spring n'laintains the roller 28 in engagement with the periphery ol the carrier during its 1'0- tary movement and when the arm 22 strikes the roller the pawl is rockedon its pivot to swing the projection 13 out of engagement with the drum. The spring- 30 forces the roller into the recess 31 whieh retains the plow in its raised position. The rocli'iner oi the pawl by its engagement with the roller also permits the spring 14 to draw the trigger to its position for holding the pawl with itaprojection 18 out of engagemeht with the drum.

The plow bottoms may be adjusted by means at the lever 26 to out any desired depth ol 'lurrow. \Vhen it is desired to lower the plows into the IOlllltl the cord is hgain -pulled to move tie roller 28 out of the recess 3 which permits the plow beam and plow *ottonis to fall by gravity thus rotating the carrier in a reverse direction to the direction of rotation or the wheel Ll until the notch again reeeives the roller 28. The pawlandtrigger are thus inpos ition to be actuated when it desired to raise the plow agaiin j j k As hereinhefoi'e mentioned, the tene when positioned in the iiotel 32 is en aged the shoulder 32.) whioli loeks the eranlr 3 relative to the l eiini d and prevents the plow hottoms from lilo ting? relative to the land wheel. Vl itli this arrangement the depth oil the tnrrow does not vary it the land iiiheel drops into a depression. M

It will he noted that the curved end of the trip-eel: is so shaped and tie positioned relative to the not-eh that the roller will pass into the notch when the carrier rotates to lower the p low bottom, pl telet the notch the roller is i ositioned to engage curved end ot the trigger without apple cialile lost motion.

What we claim M l. in a power lift lor lplows the -coitihinaiion with an aide; alirnd wheel ournalled thereon. of a pawl and trigger. earrier ti'ee l mounted on the axle; a dri m secured to the land wheel; a pawl liivotet-l on the said carrier and provided with. a projeetioii adapted to he clutched with the drum; "a trigger pivoted on the said carrier andadapted to engage the pawl to positihn the projection out 0t engagement with the (1m spring means tending to reel: the draw it to its position for holding the pawl with its proicction out at exigent-intent with the drum andu'endingto rot-l; the pawl to clutch the projection with the drum; and means for rocking the trigger on its pivot.

2. .ln a ptnver lift for plows. theieoinhination with an ardent: land wheel journailed tl'iereon, ot' a pawl and trigger earrier treel mounted on the axle; a drum secured to the land wheel; a. pawl pivoted on the said carrier and. provided ivith 'a projection adapted to be clutched with the drain 1 a tri 'er pivotedon the said carrier v. and adapted to engage the pawl to position th t projection out of engagement with the drum: spring means tending to rock the trig' z'ei' to draw itto itspostion tor holding; the pawl with its project on outo'l en- ;raejement with the drum andflte' d'inig to rock the pawl to clutch the projection with the drum, the trigger havingcan outer end;

and meansincluding a lever having a roller adapted to engage the said end to rock the trigger, the periphery of the carrier having a notch located adjacent the said end to receive the roller and adapted to retain it therein until manually released. I

In a power lift for plows, the combination with an axle; a land wheel journalled thereon, of a pawl and trigger carrier freely mounted on the axle; a drum secured to the land wheel; a pawl pivoted on the said carrier and provided with a projection adapted tobe clutched withthe drum; an extension formed on the pawl and having a recess formed in its end; a trigger pivoted on the said carrier and provided with a nose adapted to engage one side of the extension to hold the projection out of engagement with the drum and adapted to engage in the recess to limit the movement of the projection towards its clutching position; spring means tending to rock the trigger to draw it to its position for holding the pawl with its projection out of engagewith a projection adapted to be clutched with the drum; a trigger pivoted on the said carrier and adapted to engage the pawl to position the projection out of engagement with the drum; spring means tending to rock the trigger to draw it to its position for holding the pawl with its projection out of engagement with the drum and tending to rock the pawl to clutch the projection with the drum; means for rocking the trigger on its pivot; and means for preventing an accidental relative movement between the trigger rocking means and the carrier under working conditions of the plow whereby the plow bottom will be held in fixed relationship to the land wheel.

5. In a power lift for plows, the combination with an axle; a land wheel journalled thereon, of a pawl and trigger carrier freely mounted on the axle; a drum secured to the land wheel; a pawl pivoted on the said carrier and provided with a projection adapted'to be clutched with the drum; a trigger pivoted on the said carrier to engage the-pawl to position the projection out of clutching engagement with the drum; means for rocking the trigger on its pivot to permit the projection to move into clutching engagement with the drum; and means for preventing an accidental relative movement between the trigger and the trigger rocking means while the plow is working whereby the plow bottom will be held in fixed relationship to the land wheel;

6. In a plow the combination with an axle; a land wheel journalled thereon; of power lifting means including a pawl and trigger carrier freely mounted on the axle and having a notch formed'in its periphery; a drum secured to the land wheel; a pawl pivoted on said carrier and provided with a projection adapted to be clutched with the drum;

a trigger pivoted on the carrier normally tending to hold the pawl out of clutch with the drum and provided with a curved end adjacent the notch aforesaid; a trigger actuating lever carrying a projection adapted to pass between the carrier and the curved end of the trigger into the notch when the carrier is rotated by the lowering of the plow to working position, the said end being shaped to be engaged by the projection with out appreciable lost motion when the lever is rocked to actuate the trigger.

7. In :1 power lift for plows, the combination with an axle; a land wheel journalled thereon, of a pawl and trigger carrier freely mounted on the axle; a drum secured to the land wheel; a pawl pivoted'on the said car rier and provided with a projection adapted to be, clutched with the drum; a trigger pivoted on the said carrier and adapted to engage the pawl to position the projection out of engagement with the drum; a spring having one end connected with the trigger and having the other end connected with the pawl to tend to throw the projection into clutching engagement with the drum; and means for rocking the trigger on its pivot,

8. In a power lift for plows, the combination with an axle; a land wheel journalled thereon, of a pawl and trigger carrier freely mounted on the axle; a drum secured to the land wheel; a pawl pivoted on the said .carrier and provided with a projectionadapted to be clutched with the drum; a trigger piv-' 'oted on the said carrier and adapted to engage the pawl to position the projection out of engagement with the drum; a spring connected with the trigger and the pawl tending to rock the trigger to draw it to its position for holding the pawl with its projection out of engagement with the drum and tending to rock the pawl to clutch the projection with the drum; and means for rocking the trigger on its pivot.

9. In a power lift for plows, the combination with an axle; a land wheel journalled thereon, of a pawl and trigger carrier freely mounted on the axle; a drum secured to the land wheel; a pawl pivoted on the said carrier and provided with a projection adapted to be clutched with the drum; an extension formed on the pawl and having a recess formed in its end; a trigger pivoted on the said carrier and provided with a nose ildillflltd f0 vngago mic side of the extension to mm the pwjoction out of engagement with the drum and! adapted to vi'igaga in the 115cm to limit fliv nmvonmib 01 the p10j0c- (i011 towards its clutching position; a spring cm'iimctil with the trigger and the pawl tending to ruck the nigger to draw it to its p0 tiwn ior hdldiiig the p21 wi with its projeclion out of migfnge111e11t with the drum and tending to rock the pawl 10 clutch the pH)- lon with the drum, thv trig 1' inning an oliter end; and menus incluc'ling a lever adaptt'd to engage the said end to rock the Lmmiwl trigger imd permit the spi'irig to m]: fife pawl to clutch the PIUjQLiiZiOIl with the drmn, the pawl being pmvicfied with an :ufn'i minpgmi to be engzlgmi by the lever to rock 1m pi wi imjuviiion out of engugen'lent wifl'i Hi0 (5min and permit the awn-ingto rock the o? 'L hv mieminn.

liziignud at 'Hrunifm'd this 2x111 day 01 ixiwch 15,7126.

'WILLIAM JOH VEI-IITY. PAUL A-LHILUIAIVI VAN SICKLE. 

